AutoCodes – Cadillac – P182B Cadillac

P182B Cadillac Code - Internal Mode Switch 'B' Circuit Low Voltage

Quick Answer

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P182B Cadillac indicates Internal Mode Switch 'B' Circuit Low Voltage.
Common causes: Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,121

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P182B Cadillac Description

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. The internal mode switch consists of 5 separate hall effect switches. Each hall effect switch is supplied with a 9 V reference circuit and a signal circuit from the TCM. Each signal circuit for each gear selector position will have either a voltage reading of 0.70–0.96 V indicating On or 1.68–2.38 V indicating Off. The voltage values on each internal mode switch circuit will change and are dependent on the position of the gear selector. The state of each internal mode switch A/B/C/P/S signal circuit is displayed on the scan tool. The Diagnostic Trouble Code (DTC) will be set when the TCM has detected the internal mode switch B signal circuit voltage is less than 0.7 V, for 1.75 s.

OBDII Code P182B Cadillac - Internal Mode Switch 'B' Circuit Low Voltage - AutoCodes.com — P182B Cadillac Code - Internal Mode Switch 'B' Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P182B Cadillac?

Faulty Transmission Internal Mode Switch
Transmission Internal Mode Switch harness is open or shorted
Transmission Internal Mode Switch circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P182B Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P182B Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P182B Cadillac Code

1. What are common symptoms of OBDII code P182B in a Cadillac related to the Internal Mode Switch 'B' Circuit Low Voltage?

The common symptoms include issues with shifting gears, difficulty engaging the transmission, and the vehicle not starting.

2. What are the possible causes of OBDII code P182B in a Cadillac?

Possible causes include a faulty internal mode switch, damaged wiring or connectors in the circuit, low voltage in the circuit, or a malfunctioning transmission control module.

3. How serious is the OBDII code P182B in a Cadillac?

This code can lead to significant transmission issues if not addressed promptly. It is important to diagnose and repair the underlying problem to avoid further damage.

4. How can I diagnose OBDII code P182B in a Cadillac?

Diagnosis typically involves using a scan tool to read the code, testing the internal mode switch, checking the wiring and connectors for damage, and verifying voltage levels in the circuit.

5. Can I drive my Cadillac with OBDII code P182B present?

It is not recommended to drive the vehicle with this code present, as it can lead to transmission problems that may result in unsafe driving conditions or further damage to the vehicle.

6. How can I repair OBDII code P182B in a Cadillac?

Repair options include replacing the internal mode switch, repairing or replacing damaged wiring or connectors, checking and adjusting voltage levels, or replacing the transmission control module if necessary.

7. Will resetting the OBDII code P182B in a Cadillac make the issue go away?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code. It is essential to diagnose and repair the issue to prevent it from recurring.

8. Can a DIY enthusiast fix OBDII code P182B in a Cadillac?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing this code may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it cost to repair OBDII code P182B in a Cadillac?

The cost of repair can vary depending on the underlying cause of the code, parts needed for replacement, and labor charges. It is advisable to obtain quotes from different repair shops for an accurate estimate.

10. How long does it take to repair OBDII code P182B in a Cadillac?

The repair time can vary based on the complexity of the issue and the extent of the repair needed. It is best to consult with a mechanic to determine the approximate time required to fix the problem.